echinodermatagroupF - Class Holothuroidea (Sea Cucumbers)

external image sea-cucumber_6533_600x450-1.jpg

Holothuroidea, known as sea cucumbers, lack the radial symmetry of other echinoderms. These creatures are long and tube-shaped, with a mouth at one end and an anus at the other end. The mouth of sea cucumbers features tentacles that help them retrieve food. Sea cucumbers regenerate missing body parts quickly.

Sources
http://images.nationalgeographic.com/wpf/media-live/photos/000/065/cache/sea-cucumber_6533_600x450.jpg
http://library.thinkquest.org/J001418/seacuc.html
http://www.pbs.org/edens/palau/p_sea_b_9.htm